Abstract: Combined with the characteristics and construction situation of Guangzhou Pazhou Hong Kong Macao passenger port project, this paper analyzed how to protect the existing tram track and improve the work efficiency in the construction process.The lattice column was inserted into the c-axis cast-in-place pile in the foundation pit, and also the second floor of the steel structure was constructed. The overall construction efficiency was improved by the design and optimization of the tram protective shed. The results showed that " the combination of permanent and temporary " protective shed can not only be interspersed with steel structure construction in advance, but also provide a working face for interspersed construction of various disciplines in advance. The overall construction plan can be advanced by 44 days, and the construction cost can be saved by 7.76 million yuan, which has achieved good results in practical engineering application. It can provide reference for the construction deployment of "permanent temporary combination" protective shed of projects that need to cross the existing wired track under similar circumstances.